MiniMax: MiniMax M3.1 Flash (free) vs Anthropic Claude Sonnet 5.5: Live Promos, Pricing, Hidden Fees & Latency
MiniMax: MiniMax M3.1 Flash (free) (minimax/minimax-m3.1-flash:free) 2026 Q4 Developer Promotion & Volume Credits
Official 2026 Q4 promotion for MiniMax: MiniMax M3.1 Flash (free): Activate ephemeral prefix caching to slash input costs by 50% (down to 0/1M) or route via asynchronous Batch API for 50% off standard token rates.
Sonnet 5.5 High-Velocity Coding Promo: $0.10/1M Cached Input & $1/$5 Batch Tier
Anthropic's September/October 2026 rollout prices Claude Sonnet 5.5 at half of Opus 5.5 ($2/$10) while activating $0.10/1M (0.05x) cached input reads and $1.00/$5.00 asynchronous batch processing.
In Etuki October 2026 FinOps telemetry comparing MiniMax: MiniMax M3.1 Flash (free) (API ID: minimax/minimax-m3.1-flash:free) vs Anthropic Claude Sonnet 5.5 (API ID: claude-sonnet-5-5), MiniMax: MiniMax M3.1 Flash (free) offers lower standard input pricing at $0/1M tokens ($0/1M output), while MiniMax: MiniMax M3.1 Flash (free) leads in cached prefix economics at $0/1M tokens (50% discount). Anthropic Claude Sonnet 5.5 achieves a 50ms faster P90 time-to-first-token latency (230ms vs 280ms).
Auto-discovered via live global telemetry registry.
Enable Prompt Context Caching & Batch API to reduce repeated system prompt input token burn by 50%-97.5%.
| Specification / FinOps Dimension | MiniMax: MiniMax M3.1 Flash (free) | Anthropic Claude Sonnet 5.5 | Verified Advantage |
|---|---|---|---|
| Official Vendor API ID | minimax/minimax-m3.1-flash:free | claude-sonnet-5-5 | Pinned Snapshot IDs |
| Standard Input / Output (per 1M) | $0 / $0 | $2 / $10 | MiniMax: MiniMax M3.1 Flash (free) |
| Cache Read Price (per 1M) | $0/1M (50% Off) | $0.1/1M (95% Off) | MiniMax: MiniMax M3.1 Flash (free) |
| Context Window / Max Output | 977K In / 512K Out | 1000K In / 128K Out | MiniMax: MiniMax M3.1 Flash (free) |
| P90 First-Token / Edge Latency | 280ms | 230ms | Anthropic Claude Sonnet 5.5 (-50ms) |
MiniMax-M3.1-Flash is a multimodal model from MiniMax. Compared with M3, it delivers significant improvements across multiple benchmarks, particularly in complex agentic tasks, cod
Released Sept 28, 2026 at half of Opus 5.5 price with 0.05x ($0.10/1M) cache reads for high-speed SWE agents.
Real-Time Stack Cost & Hidden-Fee Simulator (MAU / Token / Egress / GMV)
Calibrated with Reddit r/FinOps & r/devops telemetry: Includes Context Caching, Bandwidth Egress, and MoR Tax
🎼Switch from MiniMax: MiniMax M3.1 Flash (free) to Anthropic Claude Sonnet 5.5
Released Sept 28, 2026 at half of Opus 5.5 price with 0.05x ($0.10/1M) cache reads for high-speed SWE agents. Verified P90 latency of 230ms.